Water-saving siphon toilet

Abstract

A water-saving siphon toilet has a toilet body and a water tank, a eject water channel used for flushing the bottom of the toilet body and a brushing water channel used for brushing the washable surface of the toilet body are arranged between the toilet body and the water tank, and a siphon channel used for pollution is arranged at the bottom of the toilet body, and a first drain valve and a overflow pipe are arranged in the water tank, the eject water channel is isolated from the outside air, and reserved water is stored in the eject water channel for assisting flush the bottom of the toilet body next time. The eject water channel of the toilet body contacts outside air only at the water seal out of the eject hole when the toilet is at non-working states.

What is claimed is: 
     
       1. A siphon toilet, comprising:
 a toilet body; 
 a water tank; 
 an eject water channel used for flushing a bottom of the toilet body, the eject water channel being arranged between the toilet body and the water tank; 
 a brushing water channel used for brushing a washable surface of the toilet body with water, the brushing water channel being arranged between the toilet body and the water tank; and 
 a siphon channel used for removing pollution and being arranged at the bottom of the toilet body; and 
 a first drain valve being arranged in the water tank; 
 a common channel under the first drain valve; 
 an isolating wall arranged at a position where the common channel protrudes towards the washable surface, the isolating wall isolating the brushing water channel from the eject water channel; and 
 a check valve arranged on the isolating wall to be between the eject water channel and the brushing water channel, the check valve has a first state and a second state, in the first state the check valve is opened when the water tank is at a draining state, so that water flows through both the eject water channel and the brushing water channel, and in the second state the check valve is shut when the water tank is at a non-draining state, so that the eject water channel and the brushing water channel are hermetically isolated from each other, 
 wherein when the brushing water channel is not brushing the washable surface, the check valve is in the second state and a water seal is formed by the siphon channel so that an inlet of the eject water channel is isolated from outside air, so that the outside air cannot be communicated to the inlet of the eject water channel, 
 further wherein an upper end of an outlet of the eject water channel is lower than an upper part of the siphon channel, and 
 further wherein, when the brushing water channel is not brushing the washable surface, reserved water is stored in the eject water channel for flushing the bottom of the toilet body at a next flushing time in which the toilet is flushed. 
 
     
     
       2. The siphon toilet according to  claim 1 , wherein, the check valve comprises:
 a check valve body, an exit of the common channel is arranged at the check valve body; and 
 a check valve plate having a fixed end and an unfixed end to be rotatable about one axis of the fixed end, the check valve plate being movable between different positions to open and close the exit; 
 wherein when draining of the water tank is started, water flows from the common channel to the brushing water channel so as to move the check valve plate such that the exit is opened by the check valve plate so that the check valve is in the first state; 
 further wherein when the draining of the water tank nearly ends, the check valve plate moves so that the exit is closed by the check valve plate so that the check valve is in the second state. 
 
     
     
       3. The siphon toilet according to  claim 1 , further comprising:
 an overflow pipe arranged in the water tank; 
 wherein water enters the brushing water channel through the first drain valve, further wherein the overflow pipe is arranged on the first drain valve. 
 
     
     
       4. The siphon toilet according to  claim 1 , wherein, an overflow channel of the water tank is arranged out of the eject water channel and the common channel.